Tire pump



April 7, 1925.

.1. L. NlLsoN ET AL TIRE PUMP Fild may 2. isz;

`I VENTORS.' Jn Jafar@ ozmpin Patented apr. 7, 1925.

UVI STATES Jorrit L. nrnson Ann Jorim Tran Application filed May 2,

To all whom it may conce/m.'

Be it known that we, Jox-IN L. NILsoN and JOHN F. Ihunon, citizens of the United States, residing at Chicago, in the county oi Cook and State of Illinois, have invented certain new and useful Improvements in rl`ire Ijumps, orf which the following is a specilication.

@ur invention relates to air pumps and has particular reference to air pumps for in- Hating pneumatic tires and adapted to be clamped to the. running board of an automobile. rI'he objects of our invention are to simplily and reduce the cost ol construction; to obviate weak structure features found in pumps ot this type heretofore provided; to iuake more convenient the operative mounting ot' the pump; to Jfacilitate the removal oi the pump cylinder from its base for the purpose of gaining access to and adjusting the piston parts; to eliminate the bulk, weight and weaknesses of the usual cylinderI base and its pivotal connections and breaking1 strains by confining the latter to a single casting` or member which includes the cylinder-head, pump and clamp support, and

piston-lever bearings, and to utilize one end oit the cylinder itself as a base-portion, thereby eliminating;` the fittings hereto-tore pron lvided :tor said end, together with the eXtra clamp therefor. A

And with the above named general objects in view our invention consists inthe novel construction, combination and arrangement or parts, hereinafter described in detail, illustrated in 'the accompanying drawingand' more particularly pointed out inV the appended claims.

In the drawing- Figure l is a side elevation of a pump embodyinp,` our invention, clamped to a section of automobile running board, the air-tube nipple connection being shown in section.

Figure 2 is a rear end View of Figure l.

In the several views l represents the running board and 2 the pump-cylinder which is ot the drawn type which provides an integral head 3 which rests directly on the running board as lshown eliminating the usual duplicate of the rear head -4 with its base connection and separate clamp. rllhe head is the usual flanged structure and inv the present improvement has threaded connection with the cylinder 2, and as the latter is tree from base connections or direct conn lotions with the running board l it may be Ieasily and quicklyremoved, by merely unscrewmg 1t from the head d, when it is necessary tov adjust the piston parts, such` as spreading the well known cup-leather on the piston which serves both as a part of the piston and an air-inlet valve the def tails of which are not involved in the present inn'irovement.

T he head el has as an integral part thereof a rearwardly projecting bearing rub or boss 5 in which the usual piston-rod 6 is slidingly mounted and pivoted at between a pair of bosses 8 projecting from the edges of a usual light or channel bar lever 9 with portion 9 bent to lie parallel with'the cylinder 2 in its position shown in Figure l. Said lever 9 and 9 is pivoted at l0 to one end oiE a link l1 the opposite end of which is pivotedV on a pivot l2 between lugs I3 and 14 which are integral parts of the head l whereby a firm and stable support is given the pivot l2 and the link, obviating oscillatingmovementot the cylinder during operation and obviating the bending,` strains, which have heretofore caused many breakages, by transmitting the strains from the load end at I0 of 'the lever longitudinally ot the link. Il and directly against the tace ot the head 4e. rIhe swingingv movement of the cylinder in other constructions is in the present construction taken up by the link 1l and always receives the pumping strains longitudinally and thrusts them substantially squarely against the piston head 4. Hence there are no strains tending to break the lugs I3 and lei or any parts between the equivalent of the pivot 12 and the body of the pump or its base. ,In the present instance a substitute for the usual base is provided by a rearwardly proj ecting` toot or base-portion l5, which is also an integral part ot the head d, and would be substantially so even ii said foot or base` l5 were a separate member' attached in any preferred manner to the head ll, since it will be seen that said part l5 is not burdened to any appreciable extent by operating strains, being merely the support through an integral lug portion 16 oit hook form which forms a bearing` for the upper leg, or lieaqringrg` portion, or lug, I7 of' a clamp 1S of well known form, the lowervbearing portion o which is in the Yforni of the usual nut 19 with which the clampscrew20 with the disk 2l swiveled thereon, has threaded engagement. The screw 2O is provided with the usual crossbar or pin 22 by means of which it is turned CII to tighten the disk 21 against the bottom of the running board and the toot 1,5 against the top thereof. The rearward, or air-,intake stroke of the piston, or piston-rod 6, or lever 9, meets with comparatively small resistance, and the Jfoot and its bearing lug 16 are greatly relieved from said air-intake strains by the fact that the forward thrust of the link 11 tends to prevent the forward end of the cylinder 2 `from tilting upwardly. On the forward, or compression, or air-expulsion stroke, the strain of operation tends to tilt the cylinders forward end downwardly, or to impinge against the running-board, and any tendency, over and above the action and reaction at the pivots 7 and 12 respectively, to cause the cylinder and its foot 17 to slide forward on the 'forward stroke will tend to tighten the clamp engagement by the lug 16 tending to move in advance of the disk 21 and causing said parts 16 and Q1 to bind against the board l1.

The integral head portion 3 of the cylinder is provided with a threaded nipple 23, which in the present improvement is equipped with a cap Q4 and a bushing et elastic material, such as rubber, 25 which is compressed by a flange 2G on the cap against the end of the nipple 2li and against the sides of the well known air-hose nipple 27 and its air tube 28 both shown by dotted lines, said cap having, as shown, threaded connection with the nipple The cylinder head 41 is thus provided with a conveniently detachable air-tight connection between the nipples 23 and 27.

The lever portion 9i terminates in a usual angle socket 28 to be loosely engaged by a wooden handle 30 which is shown partly broken away and which may be removed in the interest of compactncss when the pump is to be placed in its packing case or the tool box ot an automobile.

Aside from the reduction in the usual number ol' parts, the savings in material and labor, and the improved action pointed out in the foregoing, the entire Jfreedom of the cylinder, other than its threaded engagement with the head 4, is of particular importance in pumps of this type where the cylinder must quite frequently be detached so as to gain access to its interior for the purpose o adjusting the flexible closure between the rigid part ot the piston and the inner walls of the cylinder. The substantially direct pull and push action at the points 7 and 12 between the lever and the single-piece member Ll, 5, 13, 14 and 15, eliminates the breakages that have hereto fore occurred in less direct lever connections with the cylinder, or its head or heads.

Vile claim as our inventionW l. in a running-board air pump, the coinbination with the pump cylinder and running-board, ot a removable closure 'l'or the rear end of the cylinder, said closure being provided with a Yli'oot portion adapted to be secured to the running board and alone arranged to support said pump on sain running-board, and iiulcrum bearing portions on said support with wnicli the piston-operated lever of said pump is pivotally connected.

2. The combination with an air-pump c inder and a running-board on which .said a J pump is mounted, of means for supporting said cylinder at .its rear enf only, said means iorming part of a cylinder-head lin ed to the fulcrum portions oi" the piston-o rated lever for said pump.

5. The combination with an air-pump having a. cup-sha sed cylinder the closed end of which is adapted to directly upon a runningboard, oi a cylinder-head reinovably closing the open ene of said cylinder and provided with a foot or base portion that extends rearwardly fron said head and away from said c' l. 'wardly ertending slide-bearing on s it.. head Afor the piston-rod oi' the pump, and connections between the pump-leverr and the piston-rod and between said lever and said piston-head vnich transmits the st clins of action and reaction in reciprocating the piston, to said cylinder-head.

fl. The combination with an air-pump coinprising a cylinder integrally closed at one end, of a head closing the opposite end, and a foot 'forming a rigid portion oi said head which entends troni the latter oppcsitely to the extension of said cy" der and provided with means for securing to a board.

rllhe ernibination with a running-board and anair-pump cylinder closed at one end and having a removable @Vlinder-head at the opposite end, ci an air-outlet nipple on said closed end, "zeans for ren'iovably clan ing an air-tube ni means on said cy pple to said outlet-n nder-head only lor secur-y ing said pump to the runningboaid 'l tor connecting the pump-operating levLA JGHN L. NILSOIT.

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